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Vitodens 100-W, B1HE/B1KE Combi Installation/Service
Fault Messages
(continued)
Function Description
Fault Messages
(continued)
Boiler Functions
Purging program
During the purging program, the circulation pump will
be alternately switched on and off for 30 sec over a
period of 20 min.
The 3-way diverter valve alternates between central
heating and DHW heating for a certain period of time.
The burner is switched off during the purging program.
Activate venting program: See “Commissioning,
inspection and maintenance”.
Filling program
In the delivered condition, the 3-way diverter valve is
set to its central position, so the system can be filled
completely. After the control unit has been switched
on, the 3-way diverter valve no longer goes into its
central position.
If the system is to be filled with the control unit switched
on, the 3-way diverter valve is moved to its central
position in the filling program and the pump is started.
Activate filling program: See “Commissioning,
inspection and maintenance”.
In this position, the control unit can be switched off and
the system can be filled completely. When the function
is activated, the burner shuts down. The program
automatically becomes inactive after 20 min.
Heating curve
The heating curves represent the relationship between
the outside temperature and the supply temperature.
Simplified: The lower the outside temperature, the higher
the supply temperature must be in order to reach the
target room temperature.
Factory settings:
Slope = 1.4
Level = 0
Slope setting ranges:
Infloor heating systems: 0.2 to 0.8
Low temperature heating systems: 0.8 to 1.6
Heating curve slope
Supply temperature
Outside temperature
Changing the slope and level
Legend
A Changing the slope
B Changing the level
(vertical parallel offset of the heating curve)
Constant operation with optional room thermostat:
System with one heating circuit without mixing valve.
The rooms are heated in accordance with the settings
of the room temperature controller/room thermostat
(accessories).
If the room temperature controller/room thermostat
issues a demand, the standard target supply
temperature is maintained.
Note: The target value is requested when the contact
at plug lH is closed.
When the contact is open, there is no demand
and no frost protection.
Heating operation
Weather-compensated operation:
The control unit determines a target supply temperature
for the boiler, subject to the outside temperature and the
slope/level of the heating curve.
Note: The target value is only requested when the
contact at plug lH is closed. When the contact
is open, there is no demand and no frost protection.
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